New 4131 Movement Explained: What Upgraded in the Daytona

Compared with 4130, the 4131 upgrades lubrication and bearings, with a claimed 10-year service interval. Replica versions mirror the bridge layout.

• Optimized Chronergy escapement
• Ball-bearing rotor
• Relocated Paraflex shocks

For collectors, 4131 means lower failure rate and a truer case-back view.

Within budget, 4131 is the best Daytona choice today.